(1)Is there a real numbera,a()1?(2)Is there a real numberb,b()0? 相关知识点: 试题来源: 解析(1) 存在满足a > 1的实数a。 (2) 存在满足b > 0的实数b。 解析: 题目询问是否存在满足特定条件的实数。 * 对于问题(1),实数范围内存在无数个大于1的数,例如1.1、2、3.5等。 * 对于...
8. If a is a real number and n is an integer, then |a"| = |a|" 相关知识点: 试题来源: 解析 case1:If a≥0,,thus case2:If a<0,if n is even,then and thus =if n is odd,,therefore we know when s is a real number and n is an integer 反馈 收藏 ...
Given 也 is a real number, and |l-m|=|m|+l, simplify an algebraic expression, then J醵碧-2梆+1二() A. |m|-l B. -|m| +1 C. m-l D. -m+1 E. simplify:化简;algebraic expression:代数式) 相关知识点: 试题来源: 解析 [思路分析]很明显J飕冒-2瞧+1=1腕T|,即本题的关键就...
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If a is a real number, then the real part of 4+i5a+i−i6 is( ).若a为一实数,则4+i5a+i−
A real number is any positive or negative number available within the entire mathematical range of numbers. Real numbers include whole numbers, rational numbers, irrational numbers and virtually any type of number that is not an imaginary number or that can’t be computed or processed logically. ...
In mathematics, ais almost any number you would use in real life. Real numbers include whole numbers (such as 1, 2, 3), rational decimal numbers (32.3), irrational numbers (π), and negative numbers (-4). They are called "real" to differentiate them from "imaginary" (or "complex") ...
cotx - tanx = a =>1/tanx - tanx = a =>1-tan^2x = atanx =>tan^2x+atanx - 1 =0 It is a quadratic equation. Discriminant of this equation, D = a^2 - 4(-1)(1) = a^2+4 So, D gt 0. So, there are two real roots of the given equation.